]>
git.wh0rd.org - dump.git/blob - restore/tape.c
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <pop@noos.fr>, 1999-2000
6 * Stelian Pop <pop@noos.fr> - AlcĂ´ve <www.alcove.fr>, 2000
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
12 * (c) UNIX System Laboratories, Inc.
13 * All or some portions of this file are derived from material licensed
14 * to the University of California by American Telephone and Telegraph
15 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
16 * the permission of UNIX System Laboratories, Inc.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. All advertising materials mentioning features or use of this software
27 * must display the following acknowledgement:
28 * This product includes software developed by the University of
29 * California, Berkeley and its contributors.
30 * 4. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 static const char rcsid
[] =
49 "$Id: tape.c,v 1.46 2001/08/16 15:24:22 stelian Exp $";
53 #include <compatlfs.h>
55 #include <compaterr.h>
63 #include <sys/param.h>
71 #ifdef HAVE_EXT2FS_EXT2_FS_H
72 #include <ext2fs/ext2_fs.h>
74 #include <linux/ext2_fs.h>
76 #include <ext2fs/ext2fs.h>
77 #include <bsdcompat.h>
79 #include <ufs/ufs/dinode.h>
80 #endif /* __linux__ */
81 #include <protocols/dumprestore.h>
85 #endif /* HAVE_ZLIB */
89 #endif /* HAVE_BZLIB */
93 #include "pathnames.h"
98 static long fssize
= MAXBSIZE
;
100 static int pipein
= 0;
101 static int magtapein
= 0; /* input is from magtape */
102 static char magtape
[MAXPATHLEN
];
103 static char magtapeprefix
[MAXPATHLEN
];
106 static char *tapebuf
; /* input buffer for read */
107 static int bufsize
; /* buffer size without prefix */
108 static char *tbufptr
= NULL
; /* active tape buffer */
109 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
110 static char *comprbuf
; /* uncompress work buf */
111 static size_t comprlen
; /* size including prefix */
113 static union u_spcl endoftapemark
;
114 static long blksread
; /* blocks read since last header */
115 static long tpblksread
= 0; /* TP_BSIZE blocks read */
116 static long tapesread
;
117 static sigjmp_buf restart
;
118 static int gettingfile
= 0; /* restart has a valid frame */
119 static char *host
= NULL
;
123 static char lnkbuf
[MAXPATHLEN
+ 1];
126 int oldinofmt
; /* old inode format conversion required */
127 int Bcvt
; /* Swap Bytes (for CCI or sun) */
128 static int Qcvt
; /* Swap quads (for sun) */
130 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
132 static void accthdr
__P((struct s_spcl
*));
133 static int checksum
__P((int *));
134 static void findinode
__P((struct s_spcl
*));
135 static void findtapeblksize
__P((void));
136 static int gethead
__P((struct s_spcl
*));
137 static void readtape
__P((char *));
138 static void setdumpnum
__P((void));
139 static u_int swabi
__P((u_int
));
141 static u_long swabl
__P((u_long
));
143 static u_char
*swab64
__P((u_char
*, int));
144 static u_char
*swab32
__P((u_char
*, int));
145 static u_char
*swab16
__P((u_char
*, int));
146 static void terminateinput
__P((void));
147 static void xtrfile
__P((char *, size_t));
148 static void xtrlnkfile
__P((char *, size_t));
149 static void xtrlnkskip
__P((char *, size_t));
150 static void xtrmap
__P((char *, size_t));
151 static void xtrmapskip
__P((char *, size_t));
152 static void xtrskip
__P((char *, size_t));
153 static void setmagtapein
__P((void));
155 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
156 static void newcomprbuf
__P((int));
157 static void readtape_set
__P((char *));
158 static void readtape_uncompr
__P((char *));
159 static void readtape_comprfile
__P((char *));
160 static void readtape_comprtape
__P((char *));
161 static char *decompress_tapebuf
__P((struct tapebuf
*, int));
162 static void msg_read_error
__P((char *));
164 static int read_a_block
__P((int, char *, size_t, long *));
165 #define PREFIXSIZE sizeof(struct tapebuf)
167 #define COMPARE_ONTHEFLY 1
170 static int ifile
; /* input file for compare */
171 static int cmperror
; /* compare error */
172 static void xtrcmpfile
__P((char *, size_t));
173 static void xtrcmpskip
__P((char *, size_t));
176 static int readmapflag
;
179 * Set up an input source. This is called from main.c before setup() is.
182 setinput(char *source
)
188 newtapebuf(NTREC
> HIGHDENSITYTREC
? NTREC
: HIGHDENSITYTREC
);
192 if (strchr(source
, ':')) {
194 source
= strchr(host
, ':');
196 if (rmthost(host
) == 0)
200 if (strcmp(source
, "-") == 0) {
202 * Since input is coming from a pipe we must establish
203 * our own connection to the terminal.
205 terminal
= fopen(_PATH_TTY
, "r");
206 if (terminal
== NULL
) {
207 warn("cannot open %s", _PATH_TTY
);
208 terminal
= fopen(_PATH_DEVNULL
, "r");
209 if (terminal
== NULL
)
210 err(1, "cannot open %s", _PATH_DEVNULL
);
214 setuid(getuid()); /* no longer need or want root privileges */
216 strncpy(magtapeprefix
, source
, MAXPATHLEN
);
217 magtapeprefix
[MAXPATHLEN
-1] = '\0';
218 snprintf(magtape
, MAXPATHLEN
, "%s%03d", source
, 1);
221 strncpy(magtape
, source
, MAXPATHLEN
);
222 magtape
[MAXPATHLEN
- 1] = '\0';
226 newtapebuf(long size
)
228 static int tapebufsize
= -1;
231 bufsize
= ntrec
* TP_BSIZE
;
232 if (size
<= tapebufsize
)
236 tapebuf
= malloc(size
* TP_BSIZE
+ sizeof(struct tapebuf
));
238 errx(1, "Cannot allocate space for tape buffer");
242 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
244 newcomprbuf(int size
)
246 size_t buf_size
= (size
+1) * TP_BSIZE
+ sizeof(struct tapebuf
);
247 if (buf_size
<= comprlen
)
250 if (comprbuf
!= NULL
)
252 comprbuf
= malloc(comprlen
);
253 if (comprbuf
== NULL
)
254 errx(1, "Cannot allocate space for decompress buffer");
256 #endif /* HAVE_ZLIB || HAVE_BZLIB */
259 * Verify that the tape drive can be accessed and
260 * that it actually is a dump tape.
265 int i
, j
, *ip
, bot_code
;
268 Vprintf(stdout
, "Verify tape and initialize maps\n");
270 msg("Launching %s\n", bot_script
);
271 bot_code
= system_command(bot_script
, magtape
, 1);
272 if (bot_code
!= 0 && bot_code
!= 1) {
273 msg("Restore aborted by the beginning of tape script\n");
279 mt
= rmtopen(magtape
, 0);
285 mt
= OPEN(magtape
, O_RDONLY
, 0);
287 err(1, "%s", magtape
);
293 if (gethead(&spcl
) == FAIL
) {
294 blkcnt
--; /* push back this block */
298 if (gethead(&spcl
) == FAIL
)
299 errx(1, "Tape is not a dump tape");
300 fprintf(stderr
, "Converting to new file system format.\n");
304 fprintf(stderr
, "Dump tape is compressed.\n");
305 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
308 errx(1,"This restore version doesn't support decompression");
309 #endif /* HAVE_ZLIB */
312 endoftapemark
.s_spcl
.c_magic
= cvtflag
? OFS_MAGIC
: NFS_MAGIC
;
313 endoftapemark
.s_spcl
.c_type
= TS_END
;
314 ip
= (int *)&endoftapemark
;
315 j
= sizeof(union u_spcl
) / sizeof(int);
320 endoftapemark
.s_spcl
.c_checksum
= CHECKSUM
- i
;
322 if (vflag
|| command
== 't' || command
== 'C')
324 if (filesys
[0] == '\0') {
326 strncpy(filesys
, spcl
.c_filesys
, NAMELEN
);
327 filesys
[NAMELEN
- 1] = '\0';
328 dirptr
= strstr(filesys
, " (dir");
332 dumptime
= spcl
.c_ddate
;
333 dumpdate
= spcl
.c_date
;
334 if (STAT(".", &stbuf
) < 0)
335 err(1, "cannot stat .");
336 if (stbuf
.st_blksize
> 0 && stbuf
.st_blksize
< TP_BSIZE
)
338 if (stbuf
.st_blksize
>= TP_BSIZE
&& stbuf
.st_blksize
<= MAXBSIZE
)
339 fssize
= stbuf
.st_blksize
;
340 if (((fssize
- 1) & fssize
) != 0)
341 errx(1, "bad block size %ld", fssize
);
342 if (spcl
.c_volume
!= 1)
343 errx(1, "Tape is not volume 1 of the dump");
344 if (gethead(&spcl
) == FAIL
) {
345 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
346 panic("no header after volume mark!\n");
349 if (spcl
.c_type
!= TS_CLRI
)
350 errx(1, "Cannot find file removal list");
351 maxino
= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
352 Dprintf(stdout
, "maxino = %ld\n", (long)maxino
);
353 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
355 errx(1, "no memory for active inode map");
357 curfile
.action
= USING
;
358 getfile(xtrmap
, xtrmapskip
);
359 if (spcl
.c_type
!= TS_BITS
)
360 errx(1, "Cannot find file dump list");
361 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
362 if (map
== (char *)NULL
)
363 errx(1, "no memory for file dump list");
365 curfile
.action
= USING
;
366 getfile(xtrmap
, xtrmapskip
);
368 * If there may be whiteout entries on the tape, pretend that the
369 * whiteout inode exists, so that the whiteout entries can be
373 SETINO(WINO
, dumpmap
);
377 * Prompt user to load a new dump volume.
378 * "Nextvol" is the next suggested volume to use.
379 * This suggested volume is enforced when doing full
380 * or incremental restores, but can be overridden by
381 * the user when only extracting a subset of the files.
386 long newvol
= 0, wantnext
= 0, i
;
387 long saved_blksread
= 0, saved_tpblksread
= 0;
388 union u_spcl tmpspcl
;
389 # define tmpbuf tmpspcl.s_spcl
391 int haderror
= 0, bot_code
= 1;
399 panic("Changing volumes on pipe input?\n");
404 saved_blksread
= blksread
;
405 saved_tpblksread
= tpblksread
;
408 exit(1); /* pipes do not get a second chance */
409 if (command
== 'R' || command
== 'r' || curfile
.action
!= SKIP
) {
416 while (newvol
<= 0) {
417 if (tapesread
== 0) {
418 fprintf(stderr
, "%s%s%s%s%s",
419 "You have not read any tapes yet.\n",
420 "Unless you know which volume your",
421 " file(s) are on you should start\n",
422 "with the last volume and work",
423 " towards the first.\n");
425 fprintf(stderr
, "You have read volumes");
427 for (i
= 1; i
< 32; i
++)
428 if (tapesread
& (1 << i
)) {
429 fprintf(stderr
, "%s%ld", buf
, (long)i
);
432 fprintf(stderr
, "\n");
435 fprintf(stderr
, "Specify next volume #: ");
436 (void) fflush(stderr
);
437 (void) fgets(buf
, TP_BSIZE
, terminal
);
438 } while (!feof(terminal
) && buf
[0] == '\n');
444 "Volume numbers are positive numerics\n");
447 if (newvol
== volno
) {
448 tapesread
|= 1 << volno
;
453 snprintf(magtape
, MAXPATHLEN
, "%s%03ld", magtapeprefix
, newvol
);
454 magtape
[MAXPATHLEN
- 1] = '\0';
456 if (bot_script
&& !haderror
) {
457 msg("Launching %s\n", bot_script
);
458 bot_code
= system_command(bot_script
, magtape
, newvol
);
459 if (bot_code
!= 0 && bot_code
!= 1) {
460 msg("Restore aborted by the beginning of tape script\n");
464 if (haderror
|| (bot_code
&& !Mflag
)) {
466 fprintf(stderr
, "Mount tape volume %ld\n", (long)newvol
);
467 fprintf(stderr
, "Enter ``none'' if there are no more tapes\n");
468 fprintf(stderr
, "otherwise enter tape name (default: %s) ", magtape
);
469 (void) fflush(stderr
);
470 (void) fgets(buf
, TP_BSIZE
, terminal
);
473 if (!strcmp(buf
, "none\n")) {
477 if (buf
[0] != '\n') {
479 (void) strncpy(magtape
, buf
, sizeof(magtape
));
480 magtape
[sizeof(magtape
) - 1] = '\0';
481 if ((pos
= strchr(magtape
, '\n')))
482 magtape
[pos
- magtape
] = '\0';
487 mt
= rmtopen(magtape
, 0);
490 mt
= OPEN(magtape
, O_RDONLY
, 0);
493 fprintf(stderr
, "Cannot open %s\n", magtape
);
504 if (gethead(&tmpbuf
) == FAIL
) {
505 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
506 fprintf(stderr
, "tape is not dump tape\n");
509 blksread
= saved_blksread
;
510 tpblksread
= saved_tpblksread
;
513 if (tmpbuf
.c_volume
!= volno
) {
514 fprintf(stderr
, "Wrong volume (%d)\n", tmpbuf
.c_volume
);
517 blksread
= saved_blksread
;
518 tpblksread
= saved_tpblksread
;
521 if (tmpbuf
.c_date
!= dumpdate
|| tmpbuf
.c_ddate
!= dumptime
) {
522 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
523 ctime4(&tmpbuf
.c_date
));
524 fprintf(stderr
, "\twanted: %s", ctime(&dumpdate
));
527 blksread
= saved_blksread
;
528 tpblksread
= saved_tpblksread
;
531 tapesread
|= 1 << volno
;
532 blksread
= saved_blksread
;
533 tpblksread
= saved_tpblksread
;
535 * If continuing from the previous volume, skip over any
536 * blocks read already at the end of the previous volume.
538 * If coming to this volume at random, skip to the beginning
539 * of the next record.
541 Dprintf(stdout
, "read %ld recs, tape starts with %ld\n",
542 tpblksread
, (long)tmpbuf
.c_firstrec
);
543 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
)) {
545 tpblksread
= tmpbuf
.c_firstrec
;
546 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
548 } else if (tmpbuf
.c_firstrec
> 0 &&
549 tmpbuf
.c_firstrec
< tpblksread
- 1) {
551 * -1 since we've read the volume header
553 i
= tpblksread
- tmpbuf
.c_firstrec
- 1;
554 Dprintf(stderr
, "Skipping %ld duplicate record%s.\n",
555 (long)i
, i
> 1 ? "s" : "");
560 if (curfile
.action
== USING
) {
562 panic("active file into volume 1\n");
566 * Skip up to the beginning of the next record
568 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
))
569 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
571 (void) gethead(&spcl
);
575 siglongjmp(restart
, 1);
580 * Handle unexpected EOF.
586 if (gettingfile
&& curfile
.action
== USING
) {
587 printf("Warning: %s %s\n",
588 "End-of-input encountered while extracting", curfile
.name
);
590 curfile
.name
= "<name unknown>";
591 curfile
.action
= UNKNOWN
;
593 curfile
.ino
= maxino
;
596 siglongjmp(restart
, 1);
601 * handle multiple dumps per tape by skipping forward to the
609 if (dumpnum
== 1 || volno
!= 1)
612 errx(1, "Cannot have multiple dumps on pipe input");
614 tcom
.mt_count
= dumpnum
- 1;
617 rmtioctl(MTFSF
, dumpnum
- 1);
620 if (ioctl(mt
, (int)MTIOCTOP
, (char *)&tcom
) < 0)
627 fprintf(stdout
, "Dump date: %s", ctime4(&spcl
.c_date
));
628 fprintf(stdout
, "Dumped from: %s",
629 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime4(&spcl
.c_ddate
));
630 if (spcl
.c_host
[0] == '\0')
632 fprintf(stdout
, "Level %d dump of %s on %s:%s\n",
633 spcl
.c_level
, spcl
.c_filesys
, spcl
.c_host
, spcl
.c_dev
);
634 fprintf(stdout
, "Label: %s\n", spcl
.c_label
);
638 extractfile(char *name
)
642 struct timeval timep
[2];
646 curfile
.action
= USING
;
648 timep
[0].tv_sec
= curfile
.dip
->di_atime
.tv_sec
;
649 timep
[0].tv_usec
= curfile
.dip
->di_atime
.tv_usec
;
650 timep
[1].tv_sec
= curfile
.dip
->di_mtime
.tv_sec
;
651 timep
[1].tv_usec
= curfile
.dip
->di_mtime
.tv_usec
;
652 #else /* __linux__ */
653 timep
[0].tv_sec
= curfile
.dip
->di_atime
;
654 timep
[0].tv_usec
= curfile
.dip
->di_atimensec
/ 1000;
655 timep
[1].tv_sec
= curfile
.dip
->di_mtime
;
656 timep
[1].tv_usec
= curfile
.dip
->di_mtimensec
/ 1000;
657 #endif /* __linux__ */
658 mode
= curfile
.dip
->di_mode
;
659 flags
= curfile
.dip
->di_flags
;
660 switch (mode
& IFMT
) {
663 fprintf(stderr
, "%s: unknown file mode 0%o\n", name
, mode
);
668 Vprintf(stdout
, "skipped socket %s\n", name
);
674 ep
= lookupname(name
);
675 if (ep
== NULL
|| ep
->e_flags
& EXTRACT
)
676 panic("unextracted directory %s\n", name
);
680 Vprintf(stdout
, "extract file %s\n", name
);
681 return (genliteraldir(name
, curfile
.ino
));
686 uid_t luid
= curfile
.dip
->di_uid
;
687 gid_t lgid
= curfile
.dip
->di_gid
;
691 getfile(xtrlnkfile
, xtrlnkskip
);
694 "%s: zero length symbolic link (ignored)\n", name
);
697 if (linkit(lnkbuf
, name
, SYMLINK
) == FAIL
)
700 (void) lchown(name
, luid
, lgid
);
706 Vprintf(stdout
, "extract fifo %s\n", name
);
713 if (mkfifo(name
, mode
) < 0) {
714 warn("%s: cannot create fifo", name
);
718 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
719 (void) chmod(name
, mode
);
722 (void) fsetflags(name
, flags
);
724 (void) chflags(name
, flags
);
732 Vprintf(stdout
, "extract special file %s\n", name
);
739 if (mknod(name
, mode
, (int)curfile
.dip
->di_rdev
) < 0) {
740 warn("%s: cannot create special file", name
);
744 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
745 (void) chmod(name
, mode
);
749 warn("%s: fsetflags called on a special file", name
);
750 (void) fsetflags(name
, flags
);
753 (void) chflags(name
, flags
);
760 Vprintf(stdout
, "extract file %s\n", name
);
767 if ((ofile
= OPEN(name
, O_WRONLY
| O_CREAT
| O_TRUNC
,
769 warn("%s: cannot create file", name
);
773 (void) fchown(ofile
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
774 (void) fchmod(ofile
, mode
);
777 (void) setflags(ofile
, flags
);
779 (void) fchflags(ofile
, flags
);
781 getfile(xtrfile
, xtrskip
);
790 * skip over bit maps on the tape
796 while (spcl
.c_type
== TS_BITS
|| spcl
.c_type
== TS_CLRI
)
801 * skip over a file on the tape
807 curfile
.action
= SKIP
;
808 getfile(xtrnull
, xtrnull
);
812 * Extract a file from the tape.
813 * When an allocated block is found it is passed to the fill function;
814 * when an unallocated block (hole) is found, a zeroed buffer is passed
815 * to the skip function.
818 getfile(void (*fill
) __P((char *, size_t)), void (*skip
) __P((char *, size_t)))
821 volatile int curblk
= 0;
822 volatile quad_t size
= spcl
.c_dinode
.di_size
;
823 volatile int last_write_was_hole
= 0;
824 quad_t origsize
= size
;
825 static char clearedbuf
[MAXBSIZE
];
826 char buf
[MAXBSIZE
/ TP_BSIZE
][TP_BSIZE
];
829 if (spcl
.c_type
== TS_END
)
830 panic("ran off end of tape\n");
831 if (spcl
.c_magic
!= NFS_MAGIC
)
832 panic("not at beginning of a file\n");
833 if (!gettingfile
&& setjmp(restart
) != 0)
837 for (i
= 0; i
< spcl
.c_count
; i
++) {
838 if (readmapflag
|| spcl
.c_addr
[i
]) {
839 readtape(&buf
[curblk
++][0]);
840 if (curblk
== fssize
/ TP_BSIZE
) {
841 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
842 fssize
: (curblk
- 1) * TP_BSIZE
+ size
));
844 last_write_was_hole
= 0;
848 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
850 (curblk
- 1) * TP_BSIZE
+ size
));
853 (*skip
)(clearedbuf
, (long)(size
> TP_BSIZE
?
855 last_write_was_hole
= 1;
857 if ((size
-= TP_BSIZE
) <= 0) {
858 for (i
++; i
< spcl
.c_count
; i
++)
859 if (readmapflag
|| spcl
.c_addr
[i
])
864 if (gethead(&spcl
) == GOOD
&& size
> 0) {
865 if (spcl
.c_type
== TS_ADDR
)
868 "Missing address (header) block for %s at %ld blocks\n",
869 curfile
.name
, (long)blksread
);
872 (*fill
)((char *)buf
, (size_t)(curblk
* TP_BSIZE
) + size
);
873 last_write_was_hole
= 0;
876 fprintf(stderr
, "Missing blocks at the end of %s, assuming hole\n", curfile
.name
);
878 size_t skp
= size
> TP_BSIZE
? TP_BSIZE
: size
;
879 (*skip
)(clearedbuf
, skp
);
882 last_write_was_hole
= 1;
884 if (last_write_was_hole
) {
885 FTRUNCATE(ofile
, origsize
);
892 * Write out the next block of a file.
895 xtrfile(char *buf
, size_t size
)
900 if (write(ofile
, buf
, (int) size
) == -1)
901 err(1, "write error extracting inode %lu, name %s\nwrite",
902 (unsigned long)curfile
.ino
, curfile
.name
);
906 * Skip over a hole in a file.
910 xtrskip(char *buf
, size_t size
)
913 if (LSEEK(ofile
, (off_t
)size
, SEEK_CUR
) == -1)
914 err(1, "seek error extracting inode %lu, name %s\nlseek",
915 (unsigned long)curfile
.ino
, curfile
.name
);
919 * Collect the next block of a symbolic link.
922 xtrlnkfile(char *buf
, size_t size
)
926 if (pathlen
> MAXPATHLEN
)
927 errx(1, "symbolic link name: %s->%s%s; too long %d",
928 curfile
.name
, lnkbuf
, buf
, pathlen
);
929 (void) strcat(lnkbuf
, buf
);
933 * Skip over a hole in a symbolic link (should never happen).
937 xtrlnkskip(char *buf
, size_t size
)
940 errx(1, "unallocated block in symbolic link %s", curfile
.name
);
944 * Collect the next block of a bit map.
947 xtrmap(char *buf
, size_t size
)
950 memmove(map
, buf
, size
);
955 * Skip over a hole in a bit map (should never happen).
959 xtrmapskip(char *buf
, size_t size
)
962 panic("hole in map\n");
967 * Noop, when an extraction function is not needed.
971 xtrnull(char *buf
, size_t size
)
979 * Compare the next block of a file.
982 xtrcmpfile(char *buf
, size_t size
)
984 static char cmpbuf
[MAXBSIZE
];
989 if (read(ifile
, cmpbuf
, size
) != size
) {
990 fprintf(stderr
, "%s: size has changed.\n",
996 if (memcmp(buf
, cmpbuf
, size
) != 0) {
997 fprintf(stderr
, "%s: tape and disk copies are different\n",
1005 * Skip over a hole in a file.
1008 xtrcmpskip(char *buf
, size_t size
)
1010 static char cmpbuf
[MAXBSIZE
];
1016 if (read(ifile
, cmpbuf
, size
) != size
) {
1017 fprintf(stderr
, "%s: size has changed.\n",
1023 for (i
= 0; i
< size
; ++i
)
1024 if (cmpbuf
[i
] != '\0') {
1025 fprintf(stderr
, "%s: tape and disk copies are different\n",
1031 #endif /* COMPARE_ONTHEFLY */
1033 #if !COMPARE_ONTHEFLY
1035 do_cmpfiles(int fd_tape
, int fd_disk
, long size
)
1037 static char buf_tape
[BUFSIZ
];
1038 static char buf_disk
[BUFSIZ
];
1043 if ((n_tape
= read(fd_tape
, buf_tape
, sizeof(buf_tape
))) < 1) {
1044 close(fd_tape
), close(fd_disk
);
1045 panic("do_cmpfiles: unexpected EOF[1]");
1047 if ((n_disk
= read(fd_disk
, buf_disk
, sizeof(buf_tape
))) < 1) {
1048 close(fd_tape
), close(fd_disk
);
1049 panic("do_cmpfiles: unexpected EOF[2]");
1051 if (n_tape
!= n_disk
) {
1052 close(fd_tape
), close(fd_disk
);
1053 panic("do_cmpfiles: sizes different!");
1055 if (memcmp(buf_tape
, buf_disk
, (size_t)n_tape
) != 0) return (1);
1061 /* for debugging compare problems */
1062 #undef COMPARE_FAIL_KEEP_FILE
1065 #ifdef COMPARE_FAIL_KEEP_FILE
1066 /* return true if tapefile should be unlinked after compare */
1071 cmpfiles(char *tapefile
, char *diskfile
, struct STAT
*sbuf_disk
)
1073 struct STAT sbuf_tape
;
1074 int fd_tape
, fd_disk
;
1076 if (STAT(tapefile
, &sbuf_tape
) != 0) {
1077 panic("Can't lstat tmp file %s: %s\n", tapefile
,
1082 if (sbuf_disk
->st_size
!= sbuf_tape
.st_size
) {
1084 "%s: size changed from %ld to %ld.\n",
1085 diskfile
, (long)sbuf_tape
.st_size
, (long)sbuf_disk
->st_size
);
1087 #ifdef COMPARE_FAIL_KEEP_FILE
1094 if ((fd_tape
= OPEN(tapefile
, O_RDONLY
)) < 0) {
1095 panic("Can't open %s: %s\n", tapefile
, strerror(errno
));
1098 if ((fd_disk
= OPEN(diskfile
, O_RDONLY
)) < 0) {
1100 panic("Can't open %s: %s\n", diskfile
, strerror(errno
));
1104 if (do_cmpfiles(fd_tape
, fd_disk
, sbuf_tape
.st_size
)) {
1105 fprintf(stderr
, "%s: tape and disk copies are different\n",
1110 #ifdef COMPARE_FAIL_KEEP_FILE
1111 /* rename the file to live in /tmp */
1112 /* rename `tapefile' to /tmp/<basename of diskfile> */
1114 char *p
= strrchr(diskfile
, '/');
1115 char newname
[MAXPATHLEN
];
1117 panic("can't find / in %s\n", diskfile
);
1119 snprintf(newname
, sizeof(newname
), "%s/debug/%s", tmpdir
, p
+ 1);
1120 if (rename(tapefile
, newname
)) {
1121 panic("rename from %s to %s failed: %s\n",
1125 fprintf(stderr
, "*** %s saved to %s\n",
1130 /* don't unlink the file (it's not there anymore */
1139 #ifdef COMPARE_FAIL_KEEP_FILE
1143 #endif /* !COMPARE_ONTHEFLY */
1145 #if !COMPARE_ONTHEFLY
1146 static char tmpfilename
[MAXPATHLEN
];
1150 comparefile(char *name
)
1155 #if !COMPARE_ONTHEFLY
1156 static char *tmpfile
= NULL
;
1160 if ((r
= LSTAT(name
, &sb
)) != 0) {
1161 warn("%s: does not exist (%d)", name
, r
);
1167 curfile
.name
= name
;
1168 curfile
.action
= USING
;
1169 mode
= curfile
.dip
->di_mode
;
1171 Vprintf(stdout
, "comparing %s (size: %ld, mode: 0%o)\n", name
,
1172 (long)sb
.st_size
, mode
);
1174 if (sb
.st_mode
!= mode
) {
1175 fprintf(stderr
, "%s: mode changed from 0%o to 0%o.\n",
1176 name
, mode
& 07777, sb
.st_mode
& 07777);
1179 switch (mode
& IFMT
) {
1193 char lbuf
[MAXPATHLEN
+ 1];
1196 if (!(sb
.st_mode
& S_IFLNK
)) {
1197 fprintf(stderr
, "%s: is no longer a symbolic link\n",
1204 getfile(xtrlnkfile
, xtrlnkskip
);
1207 "%s: zero length symbolic link (ignored)\n",
1212 if ((lsize
= readlink(name
, lbuf
, MAXPATHLEN
)) < 0) {
1213 panic("readlink of %s failed: %s", name
,
1218 if (strcmp(lbuf
, lnkbuf
) != 0) {
1220 "%s: symbolic link changed from %s to %s.\n",
1221 name
, lnkbuf
, lbuf
);
1230 if (!(sb
.st_mode
& (S_IFCHR
|S_IFBLK
))) {
1231 fprintf(stderr
, "%s: no longer a special file\n",
1238 if (sb
.st_rdev
!= (int)curfile
.dip
->di_rdev
) {
1240 "%s: device changed from %d,%d to %d,%d.\n",
1242 ((int)curfile
.dip
->di_rdev
>> 8) & 0xff,
1243 (int)curfile
.dip
->di_rdev
& 0xff,
1244 ((int)sb
.st_rdev
>> 8) & 0xff,
1245 (int)sb
.st_rdev
& 0xff);
1252 #if COMPARE_ONTHEFLY
1253 if ((ifile
= OPEN(name
, O_RDONLY
)) < 0) {
1254 panic("Can't open %s: %s\n", name
, strerror(errno
));
1260 getfile(xtrcmpfile
, xtrcmpskip
);
1263 if (read(ifile
, &c
, 1) != 0) {
1264 fprintf(stderr
, "%s: size has changed.\n",
1274 if (tmpfile
== NULL
) {
1275 /* argument to mktemp() must not be in RO space: */
1276 snprintf(tmpfilename
, sizeof(tmpfilename
), "%s/restoreCXXXXXX", tmpdir
);
1277 tmpfile
= mktemp(&tmpfilename
[0]);
1279 if ((STAT(tmpfile
, &stemp
) == 0) && (unlink(tmpfile
) != 0)) {
1280 panic("cannot delete tmp file %s: %s\n",
1281 tmpfile
, strerror(errno
));
1283 if ((ofile
= OPEN(tmpfile
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0600)) < 0) {
1284 panic("cannot create file temp file %s: %s\n",
1285 name
, strerror(errno
));
1287 getfile(xtrfile
, xtrskip
);
1288 (void) close(ofile
);
1289 #ifdef COMPARE_FAIL_KEEP_FILE
1290 if (cmpfiles(tmpfile
, name
, &sb
))
1293 cmpfiles(tmpfile
, name
, &sb
);
1296 #endif /* COMPARE_ONTHEFLY */
1302 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1303 static void (*readtape_func
)(char *) = readtape_set
;
1306 * Read TP_BSIZE blocks from the input.
1307 * Handle read errors, and end of media.
1308 * Decompress compressed blocks.
1313 (*readtape_func
)(buf
); /* call the actual processing routine */
1317 * Set function pointer for readtape() routine. zflag and magtapein must
1318 * be correctly set before the first call to readtape().
1321 readtape_set(char *buf
)
1324 readtape_func
= readtape_uncompr
;
1328 readtape_func
= readtape_comprtape
;
1330 readtape_func
= readtape_comprfile
;
1335 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1338 * This is the original readtape(), it's used for reading uncompressed input.
1339 * Read TP_BSIZE blocks from the input.
1340 * Handle read errors, and end of media.
1343 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1344 readtape_uncompr(char *buf
)
1349 ssize_t rd
, newvol
, i
;
1350 int cnt
, seek_failed
;
1352 if (blkcnt
< numtrec
) {
1353 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1359 for (i
= 0; i
< ntrec
; i
++)
1360 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1363 cnt
= ntrec
* TP_BSIZE
;
1368 i
= rmtread(&tapebuf
[rd
], cnt
);
1371 i
= read(mt
, &tapebuf
[rd
], cnt
);
1374 * Check for mid-tape short read error.
1375 * If found, skip rest of buffer and start with the next.
1377 if (!pipein
&& numtrec
< ntrec
&& i
> 0) {
1378 Dprintf(stdout
, "mid-media short read error.\n");
1382 * Handle partial block read.
1384 if (pipein
&& i
== 0 && rd
> 0)
1386 else if (i
> 0 && i
!= ntrec
* TP_BSIZE
) {
1395 * Short read. Process the blocks read.
1397 if (i
% TP_BSIZE
!= 0)
1399 "partial block read: %ld should be %ld\n",
1400 (long)i
, ntrec
* TP_BSIZE
);
1401 numtrec
= i
/ TP_BSIZE
;
1405 * Handle read error.
1408 fprintf(stderr
, "Tape read error while ");
1409 switch (curfile
.action
) {
1411 fprintf(stderr
, "trying to set up tape\n");
1414 fprintf(stderr
, "trying to resynchronize\n");
1417 fprintf(stderr
, "restoring %s\n", curfile
.name
);
1420 fprintf(stderr
, "skipping over inode %lu\n",
1421 (unsigned long)curfile
.ino
);
1424 if (!yflag
&& !reply("continue"))
1426 i
= ntrec
* TP_BSIZE
;
1427 memset(tapebuf
, 0, (size_t)i
);
1430 seek_failed
= (rmtseek(i
, 1) < 0);
1433 seek_failed
= (LSEEK(mt
, i
, SEEK_CUR
) == (off_t
)-1);
1436 warn("continuation failed");
1437 if (!yflag
&& !reply("assume end-of-tape and continue"))
1443 * Handle end of tape.
1446 Vprintf(stdout
, "End-of-tape encountered\n");
1455 if (rd
% TP_BSIZE
!= 0)
1456 panic("partial block read: %d should be %d\n",
1457 rd
, ntrec
* TP_BSIZE
);
1459 memmove(&tapebuf
[rd
], &endoftapemark
, TP_BSIZE
);
1462 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1467 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1470 * Read a compressed format block from a file or pipe and uncompress it.
1471 * Attempt to handle read errors, and end of file.
1474 readtape_comprfile(char *buf
)
1476 long rl
, size
, i
, ret
;
1478 struct tapebuf
*tpb
;
1480 if (blkcnt
< numtrec
) {
1481 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1486 /* need to read the next block */
1488 for (i
= 0; i
< ntrec
; i
++)
1489 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1491 tpb
= (struct tapebuf
*) tapebuf
;
1493 /* read the block prefix */
1494 ret
= read_a_block(mt
, tapebuf
, PREFIXSIZE
, &rl
);
1500 if (size
> bufsize
) {
1501 /* something's wrong */
1502 Vprintf(stdout
, "Prefix size error, max size %d, got %ld\n",
1505 tpb
->length
= bufsize
;
1507 ret
= read_a_block(mt
, tpb
->buf
, size
, &rl
);
1511 tbufptr
= decompress_tapebuf(tpb
, rl
+ PREFIXSIZE
);
1512 if (tbufptr
== NULL
) {
1513 msg_read_error("File decompression error while");
1514 if (!yflag
&& !reply("continue"))
1516 memset(tapebuf
, 0, bufsize
);
1521 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1527 /* Errors while reading from a file or pipe are catastrophic. Since
1528 * there are no block boundaries, it's impossible to bypass the
1529 * block in error and find the start of the next block.
1532 /* It's possible to have multiple input files using -M
1533 * and -f file1,file2...
1535 Vprintf(stdout
, "End-of-File encountered\n");
1545 msg_read_error("Read error while");
1546 /* if (!yflag && !reply("continue")) */
1551 * Read compressed data from a tape and uncompress it.
1552 * Handle read errors, and end of media.
1553 * Since a tape consists of separate physical blocks, we try
1554 * to recover from errors by repositioning the tape to the next
1558 readtape_comprtape(char *buf
)
1562 struct tapebuf
*tpb
;
1565 if (blkcnt
< numtrec
) {
1566 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1571 /* need to read the next block */
1573 for (i
= 0; i
< ntrec
; i
++)
1574 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1576 tpb
= (struct tapebuf
*) tapebuf
;
1578 /* read the block */
1579 size
= bufsize
+ PREFIXSIZE
;
1580 ret
= read_a_block(mt
, tapebuf
, size
, &rl
);
1584 tbufptr
= decompress_tapebuf(tpb
, rl
);
1585 if (tbufptr
== NULL
) {
1586 msg_read_error("Tape decompression error while");
1587 if (!yflag
&& !reply("continue"))
1589 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1595 /* Handle errors: EOT switches to the next volume, other errors
1596 * attempt to position the tape to the next block.
1599 Vprintf(stdout
, "End-of-tape encountered\n");
1608 msg_read_error("Tape read error while");
1609 if (!yflag
&& !reply("continue"))
1611 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1616 rl
= rmtioctl(MTFSR
, 1);
1622 rl
= ioctl(mt
, MTIOCTOP
, &tcom
);
1626 warn("continuation failed");
1627 if (!yflag
&& !reply("assume end-of-tape and continue"))
1629 ret
= 0; /* end of tape */
1635 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1641 * Decompress a struct tapebuf into a buffer. readsize is the size read
1642 * from the tape/file and is used for error messages. Returns a pointer
1643 * to the location of the uncompressed buffer or NULL on errors.
1644 * Adjust numtrec and complain for a short block.
1647 decompress_tapebuf(struct tapebuf
*tpbin
, int readsize
)
1649 /* If zflag is on, all blocks have a struct tapebuf prefix */
1650 /* zflag gets set in setup() from the dump header */
1651 int cresult
, blocklen
;
1652 unsigned long worklen
;
1654 unsigned int worklen2
;
1656 char *output
= NULL
,*reason
= NULL
, *lengtherr
= NULL
;
1658 /* build a length error message */
1659 blocklen
= tpbin
->length
;
1660 if (readsize
< blocklen
+ PREFIXSIZE
)
1661 lengtherr
= "short";
1663 if (readsize
> blocklen
+ PREFIXSIZE
)
1668 if (tpbin
->compressed
) {
1669 /* uncompress whatever we read, if it fails, complain later */
1670 if (tpbin
->flags
== COMPRESS_ZLIB
) {
1672 errx(1,"This restore version doesn't support zlib decompression");
1674 cresult
= uncompress(comprbuf
, &worklen
,
1675 tpbin
->buf
, blocklen
);
1681 reason
= "not enough memory";
1684 reason
= "buffer too small";
1687 reason
= "data error";
1692 if (cresult
== Z_OK
)
1696 #endif /* HAVE_ZLIB */
1698 if (tpbin
->flags
== COMPRESS_BZLIB
) {
1700 errx(1,"This restore version doesn't support bzlib decompression");
1703 cresult
= BZ2_bzBuffToBuffDecompress(
1704 comprbuf
, &worklen2
,
1705 tpbin
->buf
, blocklen
, 0, 0);
1712 reason
= "not enough memory";
1714 case BZ_OUTBUFF_FULL
:
1715 reason
= "buffer too small";
1718 case BZ_DATA_ERROR_MAGIC
:
1719 case BZ_UNEXPECTED_EOF
:
1720 reason
= "data error";
1725 if (cresult
== BZ_OK
)
1729 #endif /* HAVE_BZLIB */
1733 output
= tpbin
->buf
;
1737 numtrec
= worklen
/ TP_BSIZE
;
1738 if (worklen
% TP_BSIZE
!= 0)
1739 reason
= "length mismatch";
1743 fprintf(stderr
, "%s compressed block: %d expected: %d\n",
1744 lengtherr
, readsize
, tpbin
->length
+ PREFIXSIZE
);
1745 fprintf(stderr
, "decompression error, block %ld: %s\n",
1746 tpblksread
+1, reason
);
1754 * Print an error message for a read error.
1755 * This was exteracted from the original readtape().
1758 msg_read_error(char *m
)
1760 switch (curfile
.action
) {
1762 fprintf(stderr
, "%s trying to set up tape\n", m
);
1765 fprintf(stderr
, "%s trying to resynchronize\n", m
);
1768 fprintf(stderr
, "%s restoring %s\n", m
, curfile
.name
);
1771 fprintf(stderr
, "%s skipping over inode %lu\n", m
,
1772 (unsigned long)curfile
.ino
);
1776 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1779 * Read the first block and get the blocksize from it. Test
1780 * for a compressed dump tape/file. setup() will make the final
1781 * determination by checking the compressed flag if gethead()
1782 * finds a valid header. The test here is necessary to offset the buffer
1783 * by the size of the compressed prefix. zflag is set here so that
1784 * readtape_set can set the correct function pointer for readtape().
1785 * Note that the first block of each tape/file is not compressed
1786 * and does not have a prefix.
1789 findtapeblksize(void)
1793 struct tapebuf
*tpb
= (struct tapebuf
*) tapebuf
;
1794 struct s_spcl
*spclpt
= (struct s_spcl
*) tapebuf
;
1796 for (i
= 0; i
< ntrec
; i
++)
1797 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1801 * For a pipe or file, read in the first record. For a tape, read
1804 len
= magtapein
? ntrec
* TP_BSIZE
: TP_BSIZE
;
1806 if (read_a_block(mt
, tapebuf
, len
, &i
) <= 0)
1807 errx(1, "Tape read error on first record");
1810 * If the input is from a file or a pipe, we read TP_BSIZE
1811 * bytes looking for a dump header. If the dump is compressed
1812 * we need to read in the rest of the block, as determined
1813 * by c_ntrec in the dump header. The first block of the
1814 * dump is not compressed and does not have a prefix.
1817 if (spclpt
->c_type
== TS_TAPE
1818 && spclpt
->c_flags
& DR_COMPRESSED
) {
1819 /* It's a compressed dump file, read in the */
1820 /* rest of the block based on spclpt->c_ntrec. */
1821 if (spclpt
->c_ntrec
> ntrec
)
1822 errx(1, "Tape blocksize is too large, use "
1823 "\'-b %d\' ", spclpt
->c_ntrec
);
1824 ntrec
= spclpt
->c_ntrec
;
1825 len
= (ntrec
- 1) * TP_BSIZE
;
1829 /* read in the rest of the block based on bufsize */
1830 len
= bufsize
- TP_BSIZE
;
1832 if (read_a_block(mt
, tapebuf
+TP_BSIZE
, len
, &i
) < 0
1833 || (i
!= len
&& i
% TP_BSIZE
!= 0))
1834 errx(1,"Error reading dump file header");
1837 Vprintf(stdout
, "Input block size is %ld\n", ntrec
);
1839 } /* if (!magtapein) */
1842 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
1843 * If the value of ntrec is too large, we read less than
1844 * what we asked for; adjust the value of ntrec and test for
1845 * a compressed dump tape.
1848 if (i
% TP_BSIZE
!= 0) {
1849 /* may be old format compressed dump tape with a prefix */
1850 spclpt
= (struct s_spcl
*) tpb
->buf
;
1851 if (i
% TP_BSIZE
== PREFIXSIZE
1852 && tpb
->compressed
== 0
1853 && spclpt
->c_type
== TS_TAPE
1854 && spclpt
->c_flags
& DR_COMPRESSED
) {
1857 if (tpb
->length
> bufsize
)
1858 errx(1, "Tape blocksize is too large, use "
1859 "\'-b %d\' ", tpb
->length
/ TP_BSIZE
);
1862 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1865 ntrec
= i
/ TP_BSIZE
;
1866 if (spclpt
->c_type
== TS_TAPE
) {
1867 if (spclpt
->c_flags
& DR_COMPRESSED
)
1869 if (spclpt
->c_ntrec
> ntrec
)
1870 errx(1, "Tape blocksize is too large, use "
1871 "\'-b %d\' ", spclpt
->c_ntrec
);
1874 Vprintf(stdout
, "Tape block size is %ld\n", ntrec
);
1878 * Read a block of data handling all of the messy details.
1880 static int read_a_block(int fd
, char *buf
, size_t len
, long *lengthread
)
1888 i
= rmtread(buf
, size
);
1891 i
= read(fd
, buf
, size
);
1894 break; /* EOD or error */
1897 break; /* block at a time for mt */
1900 *lengthread
= len
- size
;
1919 setmagtapein(void) {
1920 struct mtget mt_stat
;
1921 static int done
= 0;
1926 /* need to know if input is really from a tape */
1929 magtapein
= rmtioctl(MTNOP
, 1) != -1;
1932 magtapein
= ioctl(mt
, MTIOCGET
, (char *)&mt_stat
) == 0;
1935 Vprintf(stdout
,"Input is from %s\n", magtapein
? "tape": "file/pipe");
1939 * Read the next block from the tape.
1940 * Check to see if it is one of several vintage headers.
1941 * If it is an old style header, convert it to a new style header.
1942 * If it is not any valid header, return an error.
1945 gethead(struct s_spcl
*buf
)
1953 char dummy
[TP_BSIZE
];
1960 u_int16_t c_inumber
;
1965 u_int16_t odi_nlink
;
1981 readtape((char *)buf
);
1982 if (buf
->c_magic
!= NFS_MAGIC
) {
1983 if (swabi(buf
->c_magic
) != NFS_MAGIC
)
1986 Vprintf(stdout
, "Note: Doing Byte swapping\n");
1990 if (checksum((int *)buf
) == FAIL
)
1993 swabst((u_char
*)"8i4s31i528bi192b2i", (u_char
*)buf
);
1996 readtape((char *)(&u_ospcl
.s_ospcl
));
1997 memset((char *)buf
, 0, (long)TP_BSIZE
);
1998 buf
->c_type
= u_ospcl
.s_ospcl
.c_type
;
1999 buf
->c_date
= u_ospcl
.s_ospcl
.c_date
;
2000 buf
->c_ddate
= u_ospcl
.s_ospcl
.c_ddate
;
2001 buf
->c_volume
= u_ospcl
.s_ospcl
.c_volume
;
2002 buf
->c_tapea
= u_ospcl
.s_ospcl
.c_tapea
;
2003 buf
->c_inumber
= u_ospcl
.s_ospcl
.c_inumber
;
2004 buf
->c_checksum
= u_ospcl
.s_ospcl
.c_checksum
;
2005 buf
->c_magic
= u_ospcl
.s_ospcl
.c_magic
;
2006 buf
->c_dinode
.di_mode
= u_ospcl
.s_ospcl
.c_dinode
.odi_mode
;
2007 buf
->c_dinode
.di_nlink
= u_ospcl
.s_ospcl
.c_dinode
.odi_nlink
;
2008 buf
->c_dinode
.di_uid
= u_ospcl
.s_ospcl
.c_dinode
.odi_uid
;
2009 buf
->c_dinode
.di_gid
= u_ospcl
.s_ospcl
.c_dinode
.odi_gid
;
2010 buf
->c_dinode
.di_size
= u_ospcl
.s_ospcl
.c_dinode
.odi_size
;
2011 buf
->c_dinode
.di_rdev
= u_ospcl
.s_ospcl
.c_dinode
.odi_rdev
;
2013 buf
->c_dinode
.di_atime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2014 buf
->c_dinode
.di_mtime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2015 buf
->c_dinode
.di_ctime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2016 #else /* __linux__ */
2017 buf
->c_dinode
.di_atime
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2018 buf
->c_dinode
.di_mtime
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2019 buf
->c_dinode
.di_ctime
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2020 #endif /* __linux__ */
2021 buf
->c_count
= u_ospcl
.s_ospcl
.c_count
;
2022 memmove(buf
->c_addr
, u_ospcl
.s_ospcl
.c_addr
, (long)256);
2023 if (u_ospcl
.s_ospcl
.c_magic
!= OFS_MAGIC
||
2024 checksum((int *)(&u_ospcl
.s_ospcl
)) == FAIL
)
2026 buf
->c_magic
= NFS_MAGIC
;
2029 if ((buf
->c_dinode
.di_size
== 0 || buf
->c_dinode
.di_size
> 0xfffffff) &&
2030 (buf
->c_dinode
.di_mode
& IFMT
) == IFDIR
&& Qcvt
== 0) {
2031 qcvt
.qval
= buf
->c_dinode
.di_size
;
2032 if (qcvt
.val
[0] || qcvt
.val
[1]) {
2033 printf("Note: Doing Quad swapping\n");
2038 qcvt
.qval
= buf
->c_dinode
.di_size
;
2040 qcvt
.val
[1] = qcvt
.val
[0];
2042 buf
->c_dinode
.di_size
= qcvt
.qval
;
2046 switch (buf
->c_type
) {
2051 * Have to patch up missing information in bit map headers
2054 buf
->c_dinode
.di_size
= buf
->c_count
* TP_BSIZE
;
2055 if (buf
->c_count
> TP_NINDIR
)
2058 for (i
= 0; i
< buf
->c_count
; i
++)
2063 if ((buf
->c_flags
& DR_NEWINODEFMT
) == 0)
2075 panic("gethead: unknown inode type %d\n", buf
->c_type
);
2079 * If we are restoring a filesystem with old format inodes,
2080 * copy the uid/gid to the new location.
2083 buf
->c_dinode
.di_uid
= buf
->c_dinode
.di_ouid
;
2084 buf
->c_dinode
.di_gid
= buf
->c_dinode
.di_ogid
;
2092 * Check that a header is where it belongs and predict the next header
2095 accthdr(struct s_spcl
*header
)
2097 static dump_ino_t previno
= 0x7fffffff;
2098 static int prevtype
;
2099 static long predict
;
2102 if (header
->c_type
== TS_TAPE
) {
2103 fprintf(stderr
, "Volume header (%s inode format) ",
2104 oldinofmt
? "old" : "new");
2105 if (header
->c_firstrec
)
2106 fprintf(stderr
, "begins with record %d",
2107 header
->c_firstrec
);
2108 fprintf(stderr
, "\n");
2109 previno
= 0x7fffffff;
2112 if (previno
== 0x7fffffff)
2116 fprintf(stderr
, "Dumped inodes map header");
2119 fprintf(stderr
, "Used inodes map header");
2122 fprintf(stderr
, "File header, ino %lu", (unsigned long)previno
);
2125 fprintf(stderr
, "File continuation header, ino %ld", (long)previno
);
2128 fprintf(stderr
, "End of tape header");
2131 if (predict
!= blksread
- 1)
2132 fprintf(stderr
, "; predicted %ld blocks, got %ld blocks",
2133 predict
, blksread
- 1);
2134 fprintf(stderr
, "\n");
2137 if (header
->c_type
!= TS_END
)
2138 for (i
= 0; i
< header
->c_count
; i
++)
2139 if (readmapflag
|| header
->c_addr
[i
] != 0)
2143 prevtype
= header
->c_type
;
2144 previno
= header
->c_inumber
;
2148 * Find an inode header.
2149 * Complain if had to skip, and complain is set.
2152 findinode(struct s_spcl
*header
)
2154 static long skipcnt
= 0;
2158 curfile
.name
= "<name unknown>";
2159 curfile
.action
= UNKNOWN
;
2163 if (header
->c_magic
!= NFS_MAGIC
) {
2165 while (gethead(header
) == FAIL
||
2166 header
->c_date
!= dumpdate
)
2169 switch (header
->c_type
) {
2173 * Skip up to the beginning of the next record
2175 for (i
= 0; i
< header
->c_count
; i
++)
2176 if (header
->c_addr
[i
])
2178 while (gethead(header
) == FAIL
||
2179 header
->c_date
!= dumpdate
)
2184 curfile
.dip
= &header
->c_dinode
;
2185 curfile
.ino
= header
->c_inumber
;
2189 curfile
.ino
= maxino
;
2193 curfile
.name
= "<file removal list>";
2197 curfile
.name
= "<file dump list>";
2201 panic("unexpected tape header\n");
2205 panic("unknown tape header type %d\n", spcl
.c_type
);
2209 } while (header
->c_type
== TS_ADDR
);
2214 fprintf(stderr
, "resync restore, skipped %ld blocks\n",
2224 j
= sizeof(union u_spcl
) / sizeof(int);
2231 /* What happens if we want to read restore tapes
2232 for a 16bit int machine??? */
2238 if (i
!= CHECKSUM
) {
2239 fprintf(stderr
, "Checksum error %o, inode %lu file %s\n", i
,
2240 (unsigned long)curfile
.ino
, curfile
.name
);
2250 #include <varargs.h>
2255 msg(const char *fmt
, ...)
2268 (void)vfprintf(stderr
, fmt
, ap
);
2271 #endif /* RRESTORE */
2274 swab16(u_char
*sp
, int n
)
2279 c
= sp
[0]; sp
[0] = sp
[1]; sp
[1] = c
;
2286 swab32(u_char
*sp
, int n
)
2291 c
= sp
[0]; sp
[0] = sp
[3]; sp
[3] = c
;
2292 c
= sp
[1]; sp
[1] = sp
[2]; sp
[2] = c
;
2299 swab64(u_char
*sp
, int n
)
2304 c
= sp
[0]; sp
[0] = sp
[7]; sp
[7] = c
;
2305 c
= sp
[1]; sp
[1] = sp
[6]; sp
[6] = c
;
2306 c
= sp
[2]; sp
[2] = sp
[5]; sp
[5] = c
;
2307 c
= sp
[3]; sp
[3] = sp
[4]; sp
[4] = c
;
2314 swabst(u_char
*cp
, u_char
*sp
)
2320 case '0': case '1': case '2': case '3': case '4':
2321 case '5': case '6': case '7': case '8': case '9':
2322 n
= (n
* 10) + (*cp
++ - '0');
2325 case 's': case 'w': case 'h':
2343 default: /* Any other character, like 'b' counts as byte. */
2357 swabst((u_char
*)"i", (u_char
*)&x
);
2365 swabst((u_char
*)"l", (u_char
*)&x
);
2372 * get the current position of the tape
2375 GetTapePos(long *pos
)
2380 if (ioctl(mt
, MTIOCPOS
, pos
) == -1) {
2382 fprintf(stdout
, "[%ld] error: %d (getting tapepos: %ld)\n",
2383 (unsigned long)getpid(), err
, *pos
);
2389 typedef struct mt_pos
{
2392 } MTPosRec
, *MTPosPtr
;
2395 * go to specified position on tape
2398 GotoTapePos(long pos
)
2405 if (ioctl(mt
, MTIOCTOP
, &buf
) == -1) {
2407 fprintf(stdout
, "[%ld] error: %d (setting tapepos: %ld)\n",
2408 (unsigned long)getpid(), err
, pos
);
2415 * read next data from tape to re-sync
2418 ReReadFromTape(void)
2422 if (gethead(&spcl
) == FAIL
) {
2424 fprintf(stdout
, "DEBUG 1 gethead failed\n");
2432 RequestVol(long tnum
)
2437 #endif /* USE_QFA */